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Electric Charges and Forces

Electric Force and Coulomb’s Law

Electric Force and Coulomb’s Law

Electric Charges and Forces Principles
Electric Charge

Electric Charge

Electric Charges and Forces Principles
A balloon is negatively charged by rubbing and then clings to a wall. Does this mean that the wall is positively charged? Why does the balloon eventually fall?
the electrostatic force between two point charges is 2.8x10^-5 N. If the distance between them is doubled, the charge of one of the points quadruples and the charge of the other point is cut by a factor of 3. What will the new force between them be?
Which of the following are valid quantities for the net electric charge on an object?(A) 1.6 x 10^-2 C(B) 3.2 x 10^-19 C(C) 2.4 X 10^-19 C(D) 4.0 x 10^-19 C(E) 2.4 x 10^-18 C
Conducting Sphere A has a charge of -8 µC, and identical Sphere B has a charge of +12 µC. If the spheres are touched and then separated, what is the charge on each sphere?
Two identical spheres are initially neutral. Sphere A obtains a charge of-1.28 X 10^-13 C by induction and grounding, while Sphere B remains neutral. How does the mass of Sphere A compare with that of Sphere B?
A negatively charged balloon is observed to attract a piece of aluminum foil. What can be concluded about the foil?
A helium nucleus (charge +2e) and a hydrogen nucleus (charge +e) are initially separated a certain distance. If the helium nucleus is held in place, describe the motion of the hydrogen nucleus.
What is the smallest magnitude of electric charge?
A hydrogen nucleus (charge +e) and a beryllium nucleus (charge +4e) experience a force, F. Which of the following expressions may be used to solve for the distance between the nuclei?
An object consists of subatomic particles. It has a net charge of +8.0 X 10^-19 C.Which of the following statements best describes this object?

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